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===== Jumper T12 Hardware Connections =====
The following documents the hardware inside the Jumper T12 transmitter
  * MCU: [[http://www.st.com/web/en/resource/technical/document/datasheet/CD00237391.pdf|STM32F205VET6]] 512kB Flash, 128kB RAM 100pin package
  * LCD Display: 128x64 B&W  display
  * Radio: Jumper 4-in-1 module plugged into the back of the transmitter
  * 256kbit EEPROM: ST M24256
  * Volume control: LM4875 - Controlled via I2C potentiometer (TPL0401B?)

==== STM32 Connections ====


=== GPIOA ===
^Pin               ^Description              ^
|0 (ADC_IN_0)      |Stick RV                 |
|1 (ADC_IN_1)      |Stick RH                 |
|2 (ADC_IN_2)      |Stick LV                 |
|3 (ADC_IN_3)      |Stick LH                 |
|4                 |Audio Out          |
|5                 |Switch B_H                |
|6 (ADC_IN_6)      |AUX5 POT             |
|7                 |Ext Module TX  |
|8                 |Trainer plug detect      |
|9                 |USB Vin                  |
|10                |Int Module TX     |
|11                |USB Data-                |
|12                |USB Data+                |
|13                |SWDIO (???)    |
|14                |PCBREV    |
|15 (SPI3 CS)      |LCD C/S                  |

=== GPIOB ===
^Pin             ^Description         ^
|0 (ADC_IN_8)    |AUX4 POT        |
|1               |LED Green           |
|2               |S.Port Update PWR                 |
|3               |???           |
|4               |???           |
|5               |???           |
|6 (I2C SCL)     |EEPROM SCL     |
|7 (I2C SDA)     |EEPROM SDA     |
|8               |Haptic       |
|9 (I2C WP)      |EEPROM WP      |
|10 (USART_3_TX) |Bluetooth Tx            |
|11 (USART_3_RX) |Bluetooth Rx            |
|12 (SPI2 CS)    |SD Card Enable  |
|13 (SPI2 SCK)   |SD Card SCK         |
|14 (SPI2 MISO)  |SD Card MISO        |
|15 (SPI2 MOSI)  |SD Card MOSI        |

=== GPIOC ===
^Pin            ^Description          ^
|0 (ADC_IN_10)  |Voltage detect       |
|1              |Button 'Trim LHR'   |
|2              |Button 'Trim RVU'   |
|3              |Button 'Trim RVD'   |
|4              |LED Blue      |
|5              |LED Red      |
|6              |Int Module PWR            |
|7              |Heartbeat      |
|8              |Trainer PPM In       |
|9              |Trainer PPM Out      |
|10 (SPI3 SCK)  |LCD SCK   |
|11             |LCD A0               |
|12 (SPI3 SD)   |LCD MOSI    |
|13             |???   |
|14             |XTAL                 |
|15             |XTAL                 |

=== GPIOD ===
^Pin  ^Description             ^
|0    |Power on          |
|1    |Power button press  |
|2    |Button 'Exit'           |
|3    |Button 'Page'           |
|4    |Telemetry Dir       |
|5    |Telemetry TX           |
|6    |Telemetry RX           |
|7    |Button 'Menu'           |
|8    |Ext Module Pwr                     |
|9    |SD Card Detect          |
|10   |???                |
|11   |Switch: C_L                 |
|12   |LCD RST                 |
|13   |LCD Backlight                  |
|14   |Switch H                 |
|15   |Button 'Trim LHL'                     |

=== GPIOE ===
^Pin  ^Description         ^
|0    |Switch C_H           |
|1    |Switch D_L           |
|2    |Switch D_H           |
|3    |Button 'Trim RHL'  |
|4    |Button 'Trim RHR'  |
|5    |Button 'Trim LVU'  |
|6    |Button 'Trim LVD'  |
|7    |Switch A_L           |
|8    |???           |
|9    |Button 'Plus'           |
|10   |Button 'Enter'       |
|11   |Button 'Minus'      |
|12   |Bluetooth Enable      |
|13   |Switch A_H            |
|14   |Switch F            |
|15   |Switch B_L           |


==== Externaml PPM Module (Pin 1 at bottom) ====
^Pin  ^Description  ^
|1    |SPORT        |
|2    |GND          |
|3    |???          |
|4    |Heartbeat    |
|5    |???          |

==== FCC Report ====
FCCID: [[https://fccid.io/2ANTI-T12|2ANTI-T12]]
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